[check.yml] Re-enable MacOS precommit action

Author: tkoeppe

.github/workflows/check.yml

@@ -18,7 +18,7 @@ jobs:
       matrix:
         cfg:
           - { name: 'Linux', os: 'ubuntu-24.04' }
-          # - { name: 'MacOS', os: 'macos-15' }
+          - { name: 'MacOS', os: 'macos-15' }
 
     steps:
       - name: checkout
@@ -52,7 +52,7 @@ jobs:
           eval "$(/usr/libexec/path_helper)"
           echo "PATH=${PATH}" >> ${GITHUB_ENV}
           sudo tlmgr update --self
-          sudo tlmgr install latexmk isodate substr relsize ulem fixme rsfs extract layouts enumitem l3packages l3kernel imakeidx splitindex xstring
+          sudo tlmgr install latexmk isodate substr relsize ulem fixme rsfs environ layouts enumitem l3packages l3kernel imakeidx splitindex xstring
 
       - name: make (Linux)
         if: matrix.cfg.os == 'ubuntu-24.04'